JP4237173B2 - Hole closing jig and hole closing method using the hole closing jig - Google Patents

Description

  The present invention relates to a hole closing jig for efficiently and completely closing a hole provided in, for example, a standing concrete electric pole as a structure, and a hole closing method using the hole closing jig About.

  In recent years, a method for reinforcing an electric pole that reinforces an electric pole by filling a hollow portion of the electric pole with a reinforcing material such as mortar has been widely practiced.

  When reinforcing such a utility pole, a vertical work hole of, for example, several tens of centimeters is provided in the utility pole, and a reinforcing material such as an aramid rod is inserted into the hollow portion inside the utility pole from this hole, and these holes are further formed. A method of filling a hollow portion with a reinforcing material such as mortar after completely filling is known.

  For example, when closing a hole drilled on the side of a standing electric pole, for example, an opening of a utility pole drilled for work, the hole is filled and closed with water mortar or water cement, etc. To do. Then, after closing the hole, after the water-stopping mortar used for closing solidifies, a funnel-shaped member is attached to the top opening of the utility pole, and a reinforcing material (such as non-shrink mortar and reinforcing bar) is installed in the hollow part of the utility pole. The hollow portion is filled with a reinforcing material.

  However, in the case of this construction method, since the worker cannot work from the back side of the hole, that is, the inside of the electric pole when closing the hole, the mortar must be embedded in the hole from the surface side of the electric pole. However, in a normal process, the mortar falls on the back side of the hole, that is, inside the hollow portion, and a skillful technique is required to fill the hole having a length of about several tens of centimeters.

Furthermore, when the filling method and solidification are incomplete, when the mortar for reinforcement is filled in the hollow part of the utility pole, the internal pressure is increased by these mortars, etc., and the mortar used for clogging is released to the outside. Could leak out.
Japanese Patent Application No. 2005-196864

  As described above, the conventional hole closing method has a problem that a skillful technique for closing with a mortar is required.

  The present invention has been made in view of the above, and uses a hole closing jig capable of completely closing a hole in a short time and easily even by an unskilled operator, and the hole closing jig. It is to provide a hole closing method.

  In order to solve the above problems, a hole closing jig according to claim 1 is a hole closing jig used when a hole provided in a structure is closed with a filler, and the back side of the hole A closing plate that closes the hole, a fastener that is provided on the front side of the hole so as to face the closing plate, and fixes the closing plate to the position of the hole, and connects the closing plate and the fastener The gist is to have a connection tool.

  In the hole closing jig according to the first aspect, the holes in the structure can be easily closed in a short time without requiring skill.

  The hole closing jig according to claim 2 is a hole closing jig used when a hole provided in the structure is closed with a filler, and a plurality of holes are formed to A plate that is larger than the area, a closing plate that is applied to the hole from the back side of the hole of the structure and closes the hole from the back side, and a notch provided on the front side of the hole of the structure It has a fastener having one or more sets of hooking portions that are hooked to a portion, and a connecting tool that connects the closing plate and the fastener arranged to face each other using a hole of the closing plate. And

  The hole closing jig according to claim 3 is characterized in that the closing plate is a punching metal.

  In the hole closing jig according to claim 3, since the closing plate is a punching metal, it is inexpensive as a material and is familiar with the mortar, so that the mortar can be prevented from dropping at the time of closing by the mortar. .

  The gist of the hole closing jig according to claim 4 is that the connecting tool is a metal wire for fastening the closing plate and the fastener.

  The hole closing jig according to claim 5 is a hole closing method using a hole closing jig used when a hole provided in the structure is closed with a filler, and the hole area of the structure Applying the closing plate of the plate body larger than the hole from the back side of the hole of the structure, closing the hole from the back side, and a fastener having an outer diameter portion at least larger than the diameter of the hole The gist of the present invention is to include a step of applying from the front side of the hole of the body and a step of connecting the closing plate and the fastener arranged opposite to each other by a connecting tool.

  In the hole closing jig according to the fifth aspect, the hole in the structure can be easily closed in a short time without requiring skill.

  The hole closing jig according to claim 6 is characterized in that the closing plate is a punching metal.

  According to the present invention, the closing process can be easily performed in a short time without requiring a skillful technique when closing the hole in the structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a flowchart showing a processing procedure of a hole closing method using a hole closing jig as one embodiment according to the present invention. FIGS. 2 to 6 show the closing procedure shown in FIG. FIG.

  Hereinafter, an embodiment according to the present invention will be described with reference to FIGS. 1 to 6. In the present embodiment, a case where the side opening 11 (electric pole drilling portion) formed in the utility pole P as a hole in the structure is closed will be described as an example.

  Referring to FIG. 2, two sets of four notches 13 are formed on the left and right sides of the vertically long side opening 11 by a drilling machine D such as an electric drill or an ultrasonic drilling machine (step S11). Since this notch 13 is for hooking a steel net 19 as a fastener to be described later, a depth of about 0.5 to 2 cm and a diameter of 3 cm are sufficient, and the left and right sides have substantially the same drilling depth. And make it the same height (position). Although not shown, the cutouts 13 may be formed in the vertical direction and the vertical direction as appropriate. For example, in the case of the iron net 19 shown in FIG. 4 (c), it is assumed that four sets of notches 13 in the maximum horizontal direction and one set in the vertical direction are drilled.

  Next, as shown in FIG. 3 (c), a punched metal plate 15 that is a perforated blocking plate is prepared in advance so as to be cut slightly larger than the opening area of the side opening 11. Next, as shown in step S13, bundling wires 17 as connecting tools are passed through the holes of the punching metal plate 15 in advance at two or more locations. In FIG. 3 (b), three binding wires 17 are used in order to fasten at three places between the four steel wires in the horizontal direction of the iron net 19.

  Next, as in step S <b> 15, the punching metal plate 15 is inserted from the side opening 11 into the inside of the electric pole hollow portion with the binding wire 17 as a clue. Further, the punching metal plate 15 is applied from the inside of the electric pole hollow portion so that the binding wire 17 comes out from the side opening 11, and the punching metal plate 15 is temporarily temporarily held by the binding wire 17.

  Referring to FIG. 4, the iron net 19 is cut in advance according to the opening area of the side opening 11. For example, a steel net having a pitch of 10 cm is suitable. In the case of the iron net 19 shown in FIG. 4C, the first and fourth iron wires from the top and bottom are made slightly longer so that they can be engaged with the notch 13. On the other hand, the second and third ones from the top are slightly shorter than the lateral width of the side opening 11 so that the iron mesh 19 can be disposed in the side opening 11 without being hooked on the side opening 11.

  Next, the iron net 19 is applied to the side opening 11 from the outside of the utility pole, and the iron net 19 is bound and fixed by the binding wire 17 in a state where the iron net 19 is hooked by the notch 13. That is, the punching metal plate 15 is fixed by sandwiching the side wall surface of the utility pole with the punching metal plate 15 from the back side and the iron net 19 from the front side.

  Finally, as shown in FIG. 5, the side opening 11 is closed with a mortar 21 such as non-shrink mortar or handy concrete, and the closing process is completed.

  Next, referring to FIG. 6 to FIG. 9, an embodiment according to the present invention, together with a method for reinforcing a utility pole, will be described according to the situation at the site.

  First, in FIG. 6, the side wall surface of the utility pole is drilled to form the side opening 11. Specifically, the side opening 11 is formed at a predetermined position on the side surface of the utility pole by the drilling machine D at a location near the ground surface on the side surface of the utility pole P, for example, a location 1 m to 1.6 m from the ground surface. The shape of the side opening 11 varies depending on the inner diameter of the utility pole P at the drilling position of the utility pole P, but is substantially rectangular or substantially elliptical (long) having a horizontal diameter of about 30 to 50 mm and a vertical diameter of about 300 to 400 mm. Hole).

Further, when the start of the work, in advance from the top opening H _T or side opening 11 of the electric pole P in the hollow portion of the electric pole P, inserting a camera suspended by wires, the inner surface (especially the side surface of the hollow portion was photographed by this camera The image of the situation in the vicinity of the opening 11) and the bottom is observed with an external monitor to confirm the situation.

Next, install the winding reel 31 hanging on top of the utility pole P, feeding the suspension string 33 which is wound telephone poles P winding reel 31 wound hanging hollow portion from the top opening H _T, the hanging string 33 drops Let A weight is connected to the tip of the hanging thread 33. The tip of the hanging thread 33 is pulled out from the side opening 11 and bound with an aramid rod string connected to the upper end of the upper rod L.

  Subsequently, the suspension thread 33 wound around the suspension thread winding reel 31 is wound up, the aramid rod string and the upper rod L are sequentially pulled up inside the utility pole, and when the aramid rod string reaches the top of the utility pole, this aramid rod The upper rod L is suspended by hanging a string on the top of the utility pole. The same operation is repeated, and a plurality of (four in the present embodiment) upper rods L are suspended inside the utility pole hollow portion.

  Further, as shown in FIG. 8, the upper rod L is arranged at an appropriate position by the rod arrangement adjusting jig 35, the rod arrangement auxiliary tools 37, 39, and the like.

  Next, the side opening 11 is closed. First, the notch 13 is formed by the punching machine D on the left and right sides of the side opening 11. Subsequently, the bundling wire 17 is passed through the hole of the punching metal plate 15 at two places, upper and lower, and the punching metal plate 15 is inserted into the inside of the electric pole hollow portion from the side opening 11 using the bundling wire 17 as a clue, and the iron The net 19 is bound to the side opening 11 from the outside of the utility pole and the side wall surface of the utility pole is sandwiched, and the iron mesh 19 is bound and fixed by the binding wire 17 in a state where the iron mesh 19 is hooked by the notch 13. Finally, the side opening 11 is closed with the mortar 21 to finish the closing process.

Then, referring to FIG. 8, the mortar M of the top opening H _T of the utility pole P attached a funnel-shaped member, such as non-shrink mortar as a reinforcing material in the hollow portion of the interior of the electric pole P via a funnel-shaped member from the bucket The gap between the lower rod, the upper rod L, the rod arrangement adjusting jig 35, and the rod arrangement auxiliary tools 37 and 39 is filled with mortar M as a reinforcing material.

Thereafter, as shown in FIG. 9, the end cap T is attached to the top opening H _T and restored. Finally, the outer peripheral surface including the periphery of the side surface opening 11 is polished, and this outer peripheral surface is wound and reinforced with the aramid fiber sheet S, thereby completing the restoration of the utility pole P.

  Here, an example of the sticking method of the aramid fiber sheet S is given. First, the substrate is pretreated with a primer or the like, and then an aramid fiber sheet S having a width of about 30 cm and a strength of 120 tf / m (1176 kN / m) is formed in the vicinity of the side opening 11 using an impregnated adhesive resin. Is applied twice (forms two layers) so that the proof stress is approximately vertical. Thereafter, the aramid fiber sheet S having a width of about 10 cm and having a yield strength of 90 tf / m (882 kN / m) is wound around the side opening 11 in a spiral manner and fixed so that the yield strength is approximately horizontal. Thereby, the strength reduction near the side opening 11 due to the drilling can be prevented, and the strength before opening can be obtained. In FIG. 9, illustration of the punching metal plate 15 and the like shown in FIG. 8 is omitted.

  In addition, although this invention demonstrated the obstruction | occlusion of the hole of the standing electric pole, this invention is not limited to the hole of an electric pole, For example, it can apply also to the hole of arbitrary structures, such as a concrete wall surface. .

  In addition, although the case where the shape of the punching metal plate is a vertically long rectangle has been described, depending on the shape of the hole of the structure and the shape of the closed portion (for example, when only half of the hole of the structure is closed), the shape is square, circular, or oval. It is good also as a type | mold, Furthermore, it is good to change a board pressure suitably according to the depth of the hole of a corresponding structure.

  Further, the material of the punching metal plate is not limited to stainless steel but may be iron or the like, and it is more preferable that rust prevention treatment is applied, such as galvanization or rust prevention coating. Moreover, if strength can be secured, any material such as resin can be selected. Such a material is selected depending on the material of the structure (concrete, new building material, wood-based material, etc.) and the pressure received (in this embodiment, mortar filled for reinforcement). In addition, the shape (round hole, long hole, square hole) and arrangement (alignment, staggered) of the holes of the punching metal plate can be changed as appropriate. Further, each hole may be embossed to increase the strength or improve the familiarity with the mortar.

It is a flowchart figure which shows the process sequence of the hole obstruction | occlusion method of this invention. It is a figure which shows the blockade process procedure of the hole using the jig | tool for hole closure of this invention. It is a figure which shows the blockade process procedure of the hole using the jig | tool for hole closure of this invention. It is a figure which shows the blockade process procedure of the hole using the jig | tool for hole closure of this invention. It is a figure which shows the blockade process procedure of the hole using the jig | tool for hole closure of this invention. It is a figure which shows the process sequence of the block | close process of an electric pole. It is a figure which shows the process sequence of the block | close process of an electric pole. It is a figure which shows the process sequence of the block | close process of an electric pole. It is a figure which shows the process sequence of the block | close process of an electric pole.

Explanation of symbols

11 ... Hole drilling part 13 ... Notch (for steel mesh)
15 ... Punching metal plate 17 ... Bundling wire 19 ... Iron net 21 ... Mortar D ... Drilling machine P ... Electric pole

Claims (6)

A hole closing jig used when closing a hole provided in a structure with a filler,
A closing plate for closing the hole from the back side of the hole;
A fastener that is provided on the front side of the hole so as to face the blocking plate, and fixes the blocking plate at the position of the hole;
A hole closing jig, comprising: a connecting tool that connects the closing plate and the fastener. A hole closing jig used when closing a hole provided in a structure with a filler,
A plate that has a large number of holes drilled and is larger than the area of the holes of the structure, and a blocking plate that is applied to the holes from the back side of the holes of the structure and closes the holes from the back side;
A fastener having one or more sets of engaging portions that engage with notch portions provided on the front side of the holes of the structure;
A jig for closing a hole, comprising: a connecting tool for connecting the closing plate and the fastener arranged opposite to each other by using a hole of the blocking plate.   The hole closing jig according to claim 1, wherein the closing plate is a punching metal.   4. The hole closing jig according to claim 1, wherein the connecting tool is a metal wire that fastens the closing plate and the fastener. 5. A hole closing method using a hole closing jig used when closing holes provided in a structure with a filler,
Applying a blocking plate of the plate that is larger than the area of the hole of the structure from the back side of the hole of the structure, and closing the hole from the back side;
Applying a fastener having an outer diameter portion at least larger than the diameter of the hole from the front side of the hole of the structure;
A hole closing method using a hole closing jig, comprising: a step of connecting the closing plate and the fastener arranged opposite to each other by a connecting tool.   The hole closing method using the hole closing jig according to claim 5, wherein the closing plate is a punching metal.

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